Improvement in slide-valves



I. MARTiN & D. B. PAROW.

Improvement in Slide Valves.

10.115378 I Patentedlune13,1871.

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. thereof, reference being had to the neon m pan yinvention, we have provided the valve-scat or communicating with'each other by a trans- Unrrnn Snares PATENT omen.

IMPROVEMENT lN SLIDE-VALVES.

Specification forming part of Letters Patent No. 115,878, dated June 13, 1871.

To all whom it may concern:

Be it known that we, Isaac Mnn'rmand DANIEL B. Pnanow, of Lone Jack, in the county of Jackson and State of Missouri, have made certain new and useful Improvements in Slide-Valves; and we do hereby declare that the following is a full and true description ing drawing and to the lettersof reference marked thereon.

The objectof this invention is to lubricate steam-engine valves in a simple, economical, and thorough manner. The nature of this invention relates to the introduction of oil or other lubricating fluid between the valve-face and valve-seat by means of suitable oil-recesses in the valve-seat also to certain detail arrangement of parts by which the oil is introduced into said oil-recesses, as shall now be more fully described.

To enable those herein skilled to make and use our said improvements, we will now more fullydescribe the same, referring to the accompan mg- T Figure 1 as a side elevation; to Fig. 2-as a sectional elevation at line w y; and to Fig. 3 as a top plan of valveseat, showing oil-recesses.

The steam-cylinder A has sliding valve A, operating over ports a- (L 64- in the ordinary manner. As stated to be in the nature of our with oil-recesses or chambers B B, connecting lubrication is with the surface required, the recesses serving verse passage, b, as clearly indicated in Figs.

2 and 3. The slide-valve A has broader flanges thannsual, so as to overlap the oil-chambers B B. The oil-cup G, for introducing oil, we connect with the oil-recesses B B by a pipe, 0, said oil-cup being furthermore connected to the li ve-steam-suppl y pipe 0 from which it receives steam to forcethe oil into said recesses through the said pipe 0.

By such a manner of construction the oil or brought into immediate contact the purpose of a reservoir for supplying the lubricating agent.

It is evident that thus friction is greatly reduced, and the operation of the valve to work freely, and yet steam-tight against its face, is facilitated.

Having thus fully tion, what We claim, Letters Patent, is-

1. The arrangement, in the valve'seat, of recesses or chambers B B, communicating with each other by the ports or passage 1), substantiallyas and for the purpose set forth.

2. The pipe C with oil-cup 0, when arranged in communication with oil-recessesB B,in com bination with supply steam pipe a, substan tially asset forth.

In testimony of our said invention we have hereunto set our hands.

ISAAC MARTIN. DANIEL B. PERROWV.

described our said invenand desire to secure by Witnesses A. M. J OHNSON, RILEY PARRENT. 

